ServiceDesk Plus API v3 - Service Request

ServiceDesk Plus API v3 - Service Request

Hello,

I've been looking for a solution going forward to a way to automate reporting using the API V3 solution within ServiceDesk Plus. My site is using this on premises, and I've got access to the API tools, and an API Key, but I am having difficulties with getting the API to return me a working solution for what I'm looking for, and I'm hoping that the community may be able to assist me with this, going forward.

I'm attempting to use the Powershell Invoke-RestMethod to pull a list of all open, or active service requests by a specific technician. Every time I've made any progress at all with this, I get either limited by amount of lines, or it not actively filtering the technician, and instead returning all requests. 

If anyone at all could point me in a usable or learnable direction, I would be very grateful.
Thank you,
David